Hello @Elder-Uriel, welcome to the community!
Could you state if you’ve had this issue with specific combinations of bows and arrows?
Does it happen while simply using light attacks or while alternating between light and heavy?
Do the attack animations persists while the issue is in effect?
Is the projectile seen being shot out of the bow at all?
For sharing feedback on the current bow mechanics, please open a post on the suggestions section of the forums, so other players may also participate:
https://forums.funcom.com/c/conan-exiles/exiles-suggestions/9
Thrall AI issues are being specifically targeted in the upcoming patches, which include their inability to correctly chose a weapon present in their inventory at times.
You can read more on the issues that have already been addressed in the patch notes over at the TestLive forums:
https://forums.funcom.com/c/conan-exiles/TestLive/63
Thanks!